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Area of ​​a triangle using Heron's formula

calculator calculates the area of ​​a triangle after a length of three sides.                


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Conversion between number bases

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Trigonometric functions calculator

Calculator by entering an angle in degrees or radians calculated values ​​of the basic trigonometric functions.
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Calculate the cost of electricity consumption device

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Rainwater tank

The calculator calculates the amount of collected rainwater from the roof of the given dimensions. Long description      
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The sum of squares of integers from 1 to n

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Redemption value calculator

Calculator based on the given amount of capital, the interest rate and the number of years calculated the approximate value of the redemption. The redemption value - part of the premiums paid in the form of financial resources, which is fixed in the contract returns a policyholder in case of cancellation of insurance before the end of the contract.